Can I leave one person from a group of friends off my guest list?

My guest list is quite limited by the capacity of my venue. In my group of friends I am not close with this person but feel that she would expect an invite. There are other people who we would rather invite so can I leave her off the guest list? Or is it too much of a risk of rupturing the group of friends? It’s a really tough decision that I’ve been mulling over.